Specification	LTC3809IMSE-1#PBF

Clock Sync	False
Control Features	Tracking, Enable, Soft Start
Duty Cycle (Max) [Max]	100 %
Frequency - Switching	550 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	85 C
Operating Temperature [Min]	-40 ¯C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package / Case	10-MSOP, 10-TFSOP, Exposed Pad
Supplier Device Package	10-MSOP-EP
Synchronous Rectifier	True
Topology	Buck
Voltage - Supply (Vcc/Vdd) [Max]	9.8 V
Voltage - Supply (Vcc/Vdd) [Min]	2.75 V

LTC3809-1 Series

Part	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Function	Supplier Device Package	Topology	Package / Case	Duty Cycle (Max) [Max]	Number of Outputs	Frequency - Switching	Control Features	Output Configuration	Mounting Type	Output Phases	Operating Temperature [Max]	Operating Temperature [Min]	Output Type
Analog Devices Inc./Maxim Integrated LTC3809IMSE-1#TRPBF	2.75 V	9.8 V	Step-Down	10-MSOP-EP	Buck	10-MSOP 10-TFSOP Exposed Pad	100 %	1	550 kHz	Enable Soft Start Tracking	Positive	Surface Mount	1	85 C	-40 ¯C	Transistor Driver
Analog Devices Inc./Maxim Integrated LTC3809IMSE-1#PBF	2.75 V	9.8 V	Step-Down	10-MSOP-EP	Buck	10-MSOP 10-TFSOP Exposed Pad	100 %	1	550 kHz	Enable Soft Start Tracking	Positive	Surface Mount	1	85 C	-40 ¯C	Transistor Driver
Analog Devices Inc./Maxim Integrated LTC3809EDD-1#TRPBF	2.75 V	9.8 V	Step-Down	10-DFN (3x3)	Buck	10-WFDFN Exposed Pad	100 %	1	550 kHz	Enable Soft Start Tracking	Positive	Surface Mount	1	85 C	-40 ¯C	Transistor Driver
Analog Devices Inc./Maxim Integrated LTC3809EMSE-1#PBF	2.75 V	9.8 V	Step-Down	10-MSOP-EP	Buck	10-MSOP 10-TFSOP Exposed Pad	100 %	1	550 kHz	Enable Soft Start Tracking	Positive	Surface Mount	1	85 C	-40 ¯C	Transistor Driver
Analog Devices Inc./Maxim Integrated LTC3809IDD-1#TRPBF	2.75 V	9.8 V	Step-Down	10-DFN (3x3)	Buck	10-WFDFN Exposed Pad	100 %	1	550 kHz	Enable Soft Start Tracking	Positive	Surface Mount	1	85 C	-40 ¯C	Transistor Driver
Analog Devices Inc./Maxim Integrated LTC3809EMSE-1#TRPBF	2.75 V	9.8 V	Step-Down	10-MSOP-EP	Buck	10-MSOP 10-TFSOP Exposed Pad	100 %	1	550 kHz	Enable Soft Start Tracking	Positive	Surface Mount	1	85 C	-40 ¯C	Transistor Driver
Analog Devices Inc./Maxim Integrated LTC3809EDD-1#PBF	2.75 V	9.8 V	Step-Down	10-DFN (3x3)	Buck	10-WFDFN Exposed Pad	100 %	1	550 kHz	Enable Soft Start Tracking	Positive	Surface Mount	1	85 C	-40 ¯C	Transistor Driver
Analog Devices Inc./Maxim Integrated LTC3809IDD-1#PBF	2.75 V	9.8 V	Step-Down	10-DFN (3x3)	Buck	10-WFDFN Exposed Pad	100 %	1	550 kHz	Enable Soft Start Tracking	Positive	Surface Mount	1	85 C	-40 ¯C	Transistor Driver

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	N/A	0	$ 4.93	1m+

Description

General part information

LTC3809-1 Series

The LTC3809-1 is a synchronous step-down switching regulator controller that drives external complementary power MOSFETs using few external components. The constant frequency current mode architecture with MOSFET VDSsensing eliminates the need for a current sense resistor and improves efficiency.Optional Burst Mode operation provides high efficiency operation at light loads. 100% duty cycle provides low dropout operation, extending operating time in battery-powered systems. Burst Mode is inhibited when the MODE pin is pulled low to reduce noise and RF interference.The LTC3809-1 allows either coincident or ratiometric output voltage tracking. Switching frequency is fixed at 550kHz. Fault protection is provided by an overvoltage comparator and a short-circuit current limit comparator.The LTC3809-1 is available in tiny footprint thermally enhanced DFN and 10-lead MSOP packages.FeaturesPackageLTC3809PLL, Selectable Spread Spectrum, Power Good3x3 DFN-10, MS-10ELTC3809-1Tracking3x3 DFN-10, MS-10ELTC3808PLL, Selectable Spread Spectrum, Tracking, Power Good4x3 DFN-14, SSOP-16Applications1- or 2-Cell Lithium-Ion Powered DevicesNotebook and Palmtop Computers, PDAsPortable InstrumentsDistributed DC Power Systems

Documents

Technical documentation and resources

LTC3809IMSE-1#PBF | Datasheet

Datasheet

R421 Reliability Data

Reliability Data